ブタの初乳による抗体スクリーニング検査法の検討

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タイトル別名
  • Antibody Screening by the Use of Sow Colostrum
  • ブタ ノ ショニュウ ニ ヨル コウタイ スクリーニング ケンサホウ ノ ケントウ

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Postpartum changes in the immunoglobulin G (IgG) concentration and the agglutination antibody titers of swine atrophic rhinitis (AR) and swine erysipelas (SE) in whey and serum were studied in 24 sows. The whey IgG was highest (42.5mg/ml) immediately after farrowing (Day 0 ), when its concentration was 3 times that in the serum. The IgG concentration decreased to the same level as that of the serum by Day 16 and to half the serum concentration by Day 20. AR antibody and SE antibody could be detected in the whey, respectively, until Day 20 and Day 10. The latex agglutination antibody of Aujeszky's disease was studied in 38 whey samples collected from vaccinated sows and 23 samples from unvaccinated sows. Nine out of 9 samples on Day 0 from vaccinated sows were antibody positive and 2/2 samples on Day 10 were positive. ELISA confirmed that all the latex agglutination antibodies detected in the samples were vaccine antibodies. Antibody was not detected in 23 whey samples collected from unvaccinated sows. Examination of 6 antibody-positive cases observed in the field showed that the antibodies both in the whey and the serum had been induced by field infection. It was possible to detect antibodies effectively with colostrum, as with serum, and it appeared that colostrum antibody testing could become an effective means for the antibody screening of breeding sows and for maintaining them disease-free.

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